<html xmlns:wicket>
<head>
  title
  <wicket:message key="myKey">myValue</wicket:message>
</head>
<body>
  aaa
  <wicket:child><wicket:extend>
 <wicket:child>test</wicket:child>
</wicket:extend></wicket:child>
  bbb
</body>
</html>
